You plug the base into the A) audio out (red and white) cables on the back or side of your TV or to the headphone jack on the stereo/amplifier which transmits the sound which is picked up by the headphones, some of which run on a couple of AA batteries.
The other option is to get a bluetooth transmitter to plug into A) or above and then you can use any bluetooth headset to listen. The bluetooth option will be a little more expensive but will give you better interference free sound.
I have the exact same ones. They work great. Since my tv is in a hidden hole when traveling, I extended the audio from the set over to the stereo location on a pair of coax that stay in place. I just plug the wireless input into it when setting up.